1 /* Misc range functions.
2 Copyright (C) 2017-2020 Free Software Foundation, Inc.
3 Contributed by Aldy Hernandez <aldyh@redhat.com>.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 3, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
23 #include "coretypes.h"
27 #include "gimple-pretty-print.h"
28 #include "fold-const.h"
33 range_zero (tree type)
35 return value_range (build_zero_cst (type), build_zero_cst (type));
39 range_nonzero (tree type)
41 return value_range (build_zero_cst (type), build_zero_cst (type),
46 range_positives (tree type)
48 unsigned prec = TYPE_PRECISION (type);
49 signop sign = TYPE_SIGN (type);
50 return value_range (type, wi::zero (prec), wi::max_value (prec, sign));
54 range_negatives (tree type)
56 unsigned prec = TYPE_PRECISION (type);
57 signop sign = TYPE_SIGN (type);
62 r = value_range (type, wi::min_value (prec, sign), wi::minus_one (prec));